ᐅ How do you check if Billy shelves are deep enough?

Created on: 26 Aug 2023 09:17
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torben56
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torben56
26 Aug 2023 09:17
Hello everyone,

I recently bought a Billy shelving unit from IKEA and now want to make sure that the shelves are actually deep enough for the items I plan to store there. My question is: What is the best way to check if the Billy shelves are deep enough?

So far, I have only found the shelf dimensions in the instructions, but what I really want to know is how you measure the space optimally and what criteria you use to be absolutely sure that the depth is sufficient—especially considering different items like books, folders, or decorative pieces.

Does anyone have tips or proven methods for checking the right depth before fully setting up the shelving unit? Thanks in advance for your help!
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tra_nina
26 Aug 2023 09:45
The easiest way to check the depth of the Billy shelves is to compare it with the dimensions of the items you want to store.

IKEA specifies the standard depth for Billy shelves as usually 28 cm (11 inches) for the classic shelves. It is important to measure the maximum depth of your items and compare that to the available 28 cm (11 inches), while always allowing a few centimeters of extra space.

If you have quite large books or binders that are deeper, it is advisable to either choose products with greater depth, such as the Billy XL version, or adjust the shelves accordingly.

A folding ruler or tape measure is sufficient to check based on the maximum size of your items.
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Nakar33
26 Aug 2023 10:12
I think it’s worth taking a closer look when checking shelf depth. Although the manufacturer provides the nominal dimensions, there are some important details to consider:

1. Measuring the usable depth: The stated depth of 28 cm (11 inches) usually refers to the shelf board itself, not the back panel or the internal dimensions of the cabinet. The shape of the back panel or protruding screws inside can affect the usable depth. It’s best to measure yourself once the unit is assembled.

2. Tolerances: IKEA products typically have a manufacturing tolerance of about ±2 mm (±0.08 inches), and measurements can vary slightly depending on the batch.

3. Measuring your items: Books and binders vary significantly in depth. Standard binders require around 25 cm (10 inches), sometimes more. For large coffee table books or big boxes, you should allow at least 30 cm (12 inches) of depth.

4. Pay attention to dimension checks: For the best fit, you should also consider width and height to prevent your items from getting stuck.

If you want, I can provide a step-by-step guide on how to accurately measure the depth of your assembled shelf – this makes more sense than relying solely on the information in the manual.
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torben56
26 Aug 2023 10:29
Nakar33 schrieb:
The manufacturer provides the nominal dimensions, but some details need to be considered

That’s exactly what I was thinking. I’m a bit concerned that the 28 cm (11 inches) depth might be a little tight when evaluating usability, for example, whether a file folder can fit properly.

I’m therefore very interested in the step-by-step measuring method you mentioned for the assembled state. Perhaps you could describe it in more detail or suggest what I should pay attention to during the assembly?
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Deandre
26 Aug 2023 10:38
I support Nakar33’s approach. I usually measure like this:

1. Assemble the shelf first to ensure all angles and boards fit correctly.
2. Measure the internal dimensions towards the back panel, not just the board itself.
3. Check whether screws or mounting brackets reduce the depth slightly.
4. Measure the items precisely using a measuring tape or ruler.

Folders should fit at their deepest point; otherwise, you might run into issues if, for example, the back panel of the shelf is thin and the internal dimensions are not taken into account.

It’s also important to leave enough clearance at the front so the items don’t get stuck or protrude.
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tra_nina
26 Aug 2023 11:02
One more note: The finishing of the shelves matters. Some Billy-style shelves have a beveled edge, meaning the front edge is partly rounded or shaped differently, which affects the measurements.

Depending on whether you plan to store heavy books or boxes, it can also be useful to consider the load-bearing capacity of each shelf – if they are overloaded, they may bend, causing extra space requirements or other issues.

The depth alone is best checked by measuring the exact internal dimension, ideally with the assembled shelf.